British retailer does vintage Americana

I was amused to see this new Marks & Spencer’s line called “Vintage Americana.” This limited collection is described as “a quirky cool summer trend inspired by 50s Americana styling. Colours are bold, prints are fun and silhouettes are unashamedly feminine!”

I’m thinking they’re trying to go for a Mad Men look, perhaps, but not all of the clothes follow that lead. What do you think?